Flux



Patented Apr. 20, 1926.

"UNITED STATES PATENT OFFHIE.

Ho Drawing.

WILLIAM HOXIE, OF SHELLMAN, GEORGIA, ASSIGNOR 'I'O HENRY S. GEERY, OF

STAMFORD, CONNECTICUT.

FLUX.

Application filed March. 19, 1925 Serial No. 1 6,605.

To all whom it may concern:

Be it known that citizen of the United in the county of Randolph, in the Shellman,

1, WILLIAM Hoxm, a States, residing 1n I State of Georgia, have invented certain new and useful Improvements in Flux,'of which the following is a specification.

This invention relates to a composition of matter in the nature of a flux or welding compound. The to provide object of the invention 1s a composition of matter which position or flux which shall be capable of effective use upon oily or greasy metallic surfaces without them. In some as to improvements the necessity of cleaning pects, the mventlon relates in the flux disclosed 111 a co-pending application by the present ap plicant Serial N 192&.

One of the 0. 715,922 filed May 26,

chief objections to welds of ferrous metals effected with the aid of many fluxes is that the hard as to be pr'a chining.

is to provlde a flux which ening effect on a order that the welded surface may surface of the metal is so ctically impossible of ma- A further ob ect of the invention shall have a softweld of ferrous metals in be machined. To this end what may be termed a softening agent is combined with other elementsof the flux and by the term softening a ent is meant one which when so combined will In carrying out is formed composed of borax, a softening agent,

' In the preferred embodi-- sal ammonlac.

have the desired effect.

the invention a compound ferrlc oxlde, bicarbonate of soda and ment of the inventionthe softening agent is an ingredient having an alkaline reaction and is generally calcium sulphate. proportion of borax may A major the flux together with minor proportions of ferric oxide,

soda and sal ammoniac, are pulverized and dry state so as to ture. It has been have been obtained borax and with ingcradient having so ning agent.

agents have been an alkali, bicarbonate of and these ingredients thoroughlymixed in 'a form a fairly even mixfound that best results with the use of calcined calcium sulphate as the an alkaline reaction or although other softening found effective.

be incorporated in welding compound which A typical composition which is known to 239%, ferric oxide 2%, calcium sulphate 8% bicarbonate of soda 5% and sal ammoniac 5%.

Other ingredients having alkaline reactions may be substituted for the calcium sulphate wlth generally satisfactory results, for instance, sodium hydroxide or potassium hydroxide may be used. It has also been found that a mixture of the two last named substances, may in some circumstances, be found to give satisfactory results when substituted in the flux for the softener.

While commercial borax may be used in the flux, it is preferred that the borax be calcined inasmuch as ordinary borax bubbles up and hides the weld from the operator whereas frothing'is prevented by the use of calcined borax.

In use, the metallic surfaces to be welded or brazed are covered with a compound in the manner usual with other welding compounds or fluxes.

The compound has a wide application and can be used with substantially all metals. It is found that it will not only aid in welding and brazing, but will refine and toughen the metals at the welded surfaces and will permit a perfect junction of the welded surfaces to be obtained. It has also been found to permit perfect welding or brazing with dirty, oily or greasy surfaces thereby obviating the necessity of before they can be effectively workecbon.

While it cannot be said with certainty what effect the ingredients have. upon each other or what effect each contributes to the results obtained by the mixture as a whole, nevertheless'it has been ascertained that the mixture of the ingredients hereinbefore set forth in the proportions indicated gives a every respect to borax when used alone or to any other known combination of. ingredients heretofore used in this capacity. Furthermore any hardening of the ive the desired results is calcined borax cleaning such surfaces is superior 1n deleterious effects, such as weld or lack of homo geneity in the welded joint which incertain circumstances may be found to result with the use of borax alone are overcome with the. present compound. Difficulty has heretofore been presented in the use of many fluxes. hitherto placed upon the market in that the weld in which they are used is not homogeneous. With the use of a flux according to the present invention the Weld is found to be homogeneous in that the Welding compound is such that it causes the metal added to the weld to flow or combine with the base metal.

It is understood that the percentages of the various ingredients hereinbefore recited b as going to form the flux according to the present invention are given as examples only and that variations from the exact proportions within prescribed limits are to be deemed-within the spirit and scope of the invention, no limitation being intended except as indicated in the appended claims.

What I claim is:

1. A flux consisting of a major proportion of borax and minor proportions of oxide of iron, a carbonate of soda, sal ammoniac, calcium' sulphate and a softening agent.

2. A flux comprising borax, oxide of iron, a carbonate of soda, sal ammoniac, and a softenin agent.

3. A ux comprising borax, a carbonate of soda, sal ammoniac, and. an ingredient having an alkaline reaction.

4. A flux comprising borax, oxide of iron, a carbonate of soda, sal ammoniac, and a plurality of ingredients having an alkaline reaction.

5. A flux comprising borax, oxide of iron, a carbonate of soda, sal ammoniac, and calcium sul hate.

6. A ux consisting of a major proportion of borax, and minor proportions of oxide of iron, bicarbonate of soda, sal ammoniac, and a softening agent.

7 A flux consisting of a major proportion of borax, and minor proportions of oxide of iron, bicarbonate of soda, sal ammoniac, and

oxide of iron,

an ingredient having an alkaline reaction.

8. A flux consisting of a major proportion of borax, and minor proportions of oxide of iron, bicarbonate of soda, salammoniac and a plurality of ingredients having an alkaline reaction.

9. A flux consisting of a major proportion of borax, and minor proportions of oxide of iron, bicarbonate of soda, sal ammoniac, and

calicuin sulphate.

10. A flux consisting of eighty percent borax, two percent ferric oxide, five percent icarbonate of soda, five percent sal ammoniac and eight agent.

11.A flux consisting of eighty percent borax, two percent ferric oxide, five percent bicarbonate of soda, five percent sal ammomac, having an alkaline reaction.

12. A flux consisting of eighty percent borax, two percent ferric oxide, five percent bicarbonate of soda, five percent sal ammomac, ingredients having an alkaline reaction.

13. A flux consisting of eighty percent borax, two percent ferric oxide, five percent bicarbonate of soda, five percent sal ammoniac, and eight percent of calcium sul- 70 phate.

14. As a composition of matter, a welding and brazing compound consisting of the following ingredients pulverized and intimately mixed in the following borax, eighty percent; ferric oxide, two percent; calcium sulphate, eight percent; bicarbonate of soda, five percent; and sal ammoniac five percent. 15. A flux comprising borax, oxide of iron, 9. carbonate of sodium, sal ammoniac, calcium sulphate and a softening agent. 16. A flux consisting of 80% borax, 2% ferric oxide, 5% bicarbonate of soda, 5% sal ammoniac, 8% calcium sulphate ening agent.

This specification signed this 30 day of Dec, A. D. 1924.

WILLIAM HOXIE.

percent of a softening and eight percent of an ingredient/ and eight percent of a plurality of proportions:

and a soft- 

